Percussive hammer, drill, and the like.



W. H. WAKFER.

PBROUSSIVE HAMMER, DRILL, AND-THE LIKE. APPLICATION FILED FEB. 14, 1914.

Patented Nov. 10, 1914.

. 2 SHEETS-SHEET 1.

W, H. WAKFER.

PERGUSSIVE HAMMER, DRILL, AND THE LIKE.

APPLICATION TILED FEB 1 1914. 9 1 11 55 1 9 Pawnted Nov. 10, 1914.

2 SHEET8-SHEBT 2.

direction and the roar piston rod portion ho prmidecl with helical devices rumiing in lllll l lllllfi STATlllllil "lW'lElLLIAM HENRY WAKFER, 0F .SUUTH NORWOOID, ENGLAND, ASSIGrNOR 01" ONE-"HALF 'LlJO SAMUEL CHECK, 0F 'WALLINGTON, ENGLAND.

il i ouniifrr.

PERCUSSIVE HAIWINIEH, DRILL, AND THE LIKE.

ll. llllhliltl. ilpwifiwtion of Letters Patent ll atciitctl Now. ill till ll original application filed Juno 16, 1913, tiel'ial No. ';73,993. Divided and this application filed February i i, 1914. total lilo. Maoist.

one nut only at the forward end will giro one spcci l of rotation and the employment of l)()l;l1 nuts at respective cncls will produce h gher speed of rotation of the drill. (inc PltllTOH rod POI'MOU. however, may he l'lcli- T all whom it may comer-n;

Be it known that l, VVILLIAM l-lnum Vii-un on, a subject; of the King of Great liritain. and rosidont of 67 Vi hitworth road, South Noi-wood, in the county of l'flurrcy, England, have invented new and useful liu cally formed for co ipe'ating with a ritlcd prm'emont-s in and Conncctci'l with Porcusnut, while the other piston rod portion is sire Hammers Drills, and tl1ol,ike..,oi' which Without hclical devices and may he square tho lollowing is a specification. hcing a tlior angular in cross section, or i'lulicd or vision of my applicatiooE lerial llo; "473.993 othc p isccuitahly iorincd on that it cannot lilcd June 16, lflli'i. lillifliilha slccvo which he Similar ox- This invention relates to iinprovoincuts tornally to the rifled nut but which is in and connectcd with poroussi'vc l1am111c1':-1. formed with a non-helical square or a ugul: r drills and thcv like and chiefly concerns that o: liutod horc to (m'rcspond with its rcspcctypo of percussive tool in which 'tllk rod tiro rod portion. 'lhis sleeve may no con ort'ion of the piston hannncr ia suitably fcuicutl "reifcrrodto as a nutslecrcalthough formed to coiipcralc with a nut (lcrico to it docs not produce rotation attcr thev nuroproduce rotation oi the latter during the no! of a nut propcr. ll ith thia ;1l'l:ll1 t1l tra'vcl of the piston in one direction the ment at positive drive or turning monicnt is rotation being imparted to a toohholcling produced, because the pii'stou when urged in 71' chuck leeve by moan of a guitalilg (}]l-- ()118 direction i8 pOSltlVQly hchl against; rogag'cincnt hotwccu lhc out slocvc and chuck tatioo by the squarc. angular or llutcd rod slccvc", or lictwrcu tho piston and chuck moving in the appropriate so-callcd nut slecrc. and rcrcrau rotatio f th out being which latter in to n i=1 hchl. agaioal rotation prevented by nicaus of a ratchet and pawl in one tlircction by its. appropriate i'ulrhct. incchanisiu. and pawl ll'lfifillttlllbill']. tlo'nociuitnlly thc According to this im'cntion tho piston rifled nut positively 'lorccd to turn and double-ended that; l to so each cud of thc imparts its turning niorcnicnt to the chuck piston has its rccportirc rod portion, so thatv slcovc and the tool stccl in the latter, li v siu'iply I'm noting; tho pawlr. of tho ran-hut the piston has. a rod portion not nly at the front end hut also at tho roar cud. 'lluroand pawl niochanisui liolmigirui' u lhu lore. when ouc rod poriiou liccoinvs worn by square or rallied nut. tho turning); cilort ono l nger pOSlUYP. tlurotation hoiiip; thou dew to tho rol'uctancc of the hoary piuion lo aura undo! the action of the rilliiig. tho out slocvc and chuck. lining rri iuicoucutly givcu what is; tcrn'lcd a slip driv." rolatiod 'l lu. ratchet and pawl llitll2illl:-'ill out ac rcvcrsihlc as out forth in my application lor ll uitod iTilIHllPS latcul; tlcrial No. i'i' lWIl lilcd Juno. llilh 1913 in order to cual lc tho iurcuiiou to laroadily uudcrstood rol'oruuco is luadv to the" accoiupzurviug; drawings in which:-

l igurc l is, a longitudinal smmou oi a pcrrusaivc drill in which a douhlc ciulcd iioton is eluployod according to this inmolion: Fig. 9 partly a plan o'l' lTigz. l and partly a sect-ion on the limiii--ll llip I; 3 is a section on thc liiocvv lll--llll ia". 1; Fig. l is a section on the line ll llx Fig. l; l i-r. 5 is a longitudinal section of a modified form. of percussive ool the section being taken in a plane at: right anglos H970 as a hammer hcad. thc piolou may ho rcniorcd and town-1rd or lurucd cud for 0nd, s-:o that tho oppositc rod pm'lion will hr hrought into uuc as a hanuucr hood.

An important. dcrclopniout co'osi .04 in providing a nut slcci'c and ratchct and pawl uuchanimu which can ho readily applicd to citlicr curl of tho cyliudcr of thc tool, on that when tho piston rci'crsaod 0nd For ciuh the out slccvc and ratchet and pawl mocha lllSlll can he lra'ns'l'crrcd to tho roar and of tho cylinder.

Ratchet and pawl mechanisms may ho liilrd on liolh ends oi the tool and. two intcii" chau rcalilc nut alcoves may ho employed in conuoction therewith. onu lioinp; arraogiul' at the from; and cuo at the rclnu If, thorcioro. tho forward piston rod portion he poo I vidcd with helical devices runnii in one! the opposite Ilircction the oraploymout f lOlS to the plane oi. the section 1; Fig. 5 is e sectional elevation of s modified form 0 hammer piston; Figs. '4' and 8 are views '0 further modified forms of hammer pisficns.

Referring to tee drawings the c' linder a consists of a tubular p rt suitehly flanged in a similar manner at both ends and conteining a piston 5 which is double ended. that is to say. it is formed with forward and rear \verd p011. .ns .9 which may be identical iii every respect. or one portion may have rightdiended helical formation and tie other & le'ftdmnderl helical "formation. Gr one red portion might be formed with left or rig ll? handed helix and the other portion might be fluted, or square in cross section, or plain, or otherwise suitably formed, but in any case the parts are so constructed that the piston may be taken out of the cylinder and reversed or turned end for end and then reinserted. In this Way when one rod portion 0 becomes Worn by reason of its action as e hammer heed, the reversal of thepiston brings the other rod portion into action as the hammer head, Without afiecting the Working of apparatus, as will he explained. The rods are showniiormed with axial passages 1? communicating with passages 16 formed at their inner ends or permitting of the escepe of some of r ssure fluid irom the interior of the cyl- O '9. iiider to a hollow drill shank when used but 112. iirally the passages 15 and 17 may he mittecl from either or both of the rol p03 L time c.

The rod portions neev ii'c't formed on the piston but if desired they may be separately formed and fitted to the piston, Fer example the rod portiors may have tapered ends adapted to be and if desired secured, in QOTIQSiJODCllfi bores or recesses in the piston sliewn is F ii. 7

The

it'roiit rod portion a constantly e11- rages a nut 6 during its reciprocation which imtis rilied or suitably formed cecpe=- stihg with the front r05, pert-ion slid the extremity 0i the'front red 2; sets is a hamiier head and strikes against extremity of the Sllzlfik g oi": the tool is.

The rear end of the cylinder is closed lxj' e cover 9' which is furnished with we forated lugs n to telre longitudinal Too sec said ccver 1 p on respective ends rent heat p lasing" formed Wi I]. in

The front end of the cylinder i e ring rf'orzned with an annular for suppci ting ozieend of er described. Ti

ward the, clamps hetwe 1 ratchet ring 3 and 00"7-91 At the same time the rem toward the rear end of this Way various parts (a j j and y; held together rigidly.

The front sleeve out a mm the frcnt ratchet r m 9 and is of reduced 3 a shoulder in Joe hute is provided containing sliding pawl outri'nrd h helical sort. l. s

n./ I. l 7 I may be rormed with cylinoric so which may he. loosely inser springs i. As indicated by c Fig. 1. the intermediate portioi formed epprcxi imtely square i tion and fits easily within the square in the enlarged rear end of the chncl; The intermediate portion l of .11 the chuck sleeve is cylindrical.

5 the chuck is engulsr for receivi s an cerresponiling ly shaped ii or tool h. Tie front heed rounds. and shoulders sgei sl c uck s The i ti e Iill'i', sleeve .3

t the oi the piston b ratchettecth rating So that he forced to l'iowerer ehe pawls will teeth. thereby allowing tee meat of the piston and its turnin movement of the rife E "El the engagements 'i m with'the chuck sleeve e. i r to turn and revolve the to mci'ingthe front head 7) and .idrnwing the pewls and reverse positions., I

' end fer end and reels f 11g ecuriicg the same by hol and outs c, the apparatus will he in a, con clitioii for producing; reverse revolution cf. the tool steel hiring the rearward of the piston;

Lugs 20 may he provide 3' and the needle 19. 1c thereto by short eye colts teg'eous to err of the lugs '29 in oil shock and the mczlos of .515,

1 118d can be va- 1'12 "T1 varcl or i'csrwarol licing sl'cctoil in a Sim cl. Within a very short ,-.51Z%l, the handle 19 oi 1 lcc formed cs shown in that :Zi-giuc, more lcvcrmanipulating this tool. c the arrongcmcot off so clsscribccl lisz cin I My are not concerned :ic c3103.?

in appliessiomiaiy 14;,

oci hcsrings o1 sligotly mo save 6 are forinccl 3 which rcc'civs is 2 while. clongsizlc tlis sock s understood that the helical cle {or the rorl' ore referred to may take lo? producing 20%;-

' tions which are l J. clcvicss mci'cly while alcmsnt "os wscn such .-SP (CLPJQ sleeves formso". to pro 'vs na omsr, drill, o1" lilac tool, gsortion on cash out adapted to work portions, ratchet and ivsly connected with a'rr' ngcment ccrcussiva hammer, drill, orlikc tool, comprising a piston having a rod portion '01} csolicnd' and capable of being reversed end for coal in its cylinder so that either rod povtion may be usccl HSl-llE hammer head, intcrclcaligeablc 'nuts adapted to cooperate with the rcspcotivc rod portions, and ratchet pawl mechanism adaptell to cooycrate with the nuts substantially as described.

3. A pcrcussivs hammer, drill, or like tool, comprising a piston having a rod portion on each end and cagcable of being reversed end for snci in its cylinclsr so that either rod portion may be used as the hammer head, saidrotl portions having rotation nuts'corrcsponcling with respective rod portions and adapted to be applied to both ends of thcxcylindcr and. to be inter-- changcably arranged therein, and ratchet and. pawl mechanisms in cooperative relation with the nuts substantially as described.

ll A percussive hammer, drill, or like tool compi isizig in combination a piston having rod on each end, helical devices-on sai sods, pawls removably mounted 111 said nuts, and ratchet rings adapted to engage said pawls substantially as set forth.

A ocrcussive hammer, drill, or like tool comprising in combination a piston having a food on each end, -helical device son sai rods, rotation nuts engaging respective rods, i'cvei'siole pawls mounted in recesses in said nuts, and reversible ratchet rings adapted to enga e rcspec'tivs sets of said pawls substantially as set forth.

6. A percussive hammer, drill or like tool comprising in combination apiston, a rod on each cod of said piston, helical devices havpit-ch of one value on one of said rods, helical devices having a itch of a difie-rent value on the other of said roclsyriflecl nuts adapted to cooperate with respectivcrods, and ratchet and pawl mechanisms adapted to cooperate with respective rifled nuts substaiitially as set forth,

7 A PQICUSSlVQ hammer drill or like tool comprising in combination a piston, a rod dissimilar formations,

rotation nuts engaging respective rods,

on each cilclof. said piston, helical devices on said rods, a rifled not adapted to co operate with either of said rods and revcrsible ratchet and pawl mechanism adaptsci to coopcratc'with said rifled nut substam tiall as set fortl I WILLIAM HENRY WXKFER,

Eonn "Wlisoie,

HIL- 112s. 

